These six pollutants are known as the criteria pollutants and are covered by the National Ambient Air Quality Standards.

Question

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The National Ambient Air Quality Standards cover the six criteria pollutants which are particulates, sulfur dioxide, carbon monoxide, nitrogen oxides, lead, and ozone. Option A includes all six criteria pollutants. Option B includes VOC's and smog, both of which are not criteria air pollutants. Option C includes VOC's but does not include ozone, which is a criteria pollutant.

These Six Pollutants Are Known as the Criteria Pollutants and Are